While I was at Deep Creek yesterday two military choppers flew right over me about 100 feet up, heading upstream. I had never seen them fly so low along the creek like that before and I was wondering what they were up to. I have seen them before fly over but way high up about 1000 feet. While I was hiking down into the canyon I came across two girls, and the one had just tripped and fell on the trail, hitting her knee but she was OK and they continued there hike to DCHS.